摘要
目的探讨改善64层螺旋CT冠状动脉图像质量的条件。方法在不同的心率、不同重组算法、图像重组相位窗下,用心脏冠状动脉模具评价64层螺旋CT冠状动脉图像质量。结果心率小于70次/分,心率波动范围小于10次/分时图像质量最佳;图像质量在R-R间期的75%相位(舒张中期)最好;实验数据共108组,采用单扇区、双扇区、四扇区重组成功率分别为93.5%,91.6%,93.4%,组间差异无统计学意义(χ2=4.163,P=0.125)。优良率分别为81.8%,79.2%和84.1%。结论心率、重组算法和图像重组相位窗是影响多层螺旋CT冠状动脉成像的主要参数,运用合适参数能获得更优质图像。
Objectives To improve the image quality of 64-detector CT coronary artery angiography, and the value in evaluating the lesions of coronary artery through coronary artery phantom experiment. Methods The image quality of 64-detector CT coronary artery angiography with different heart rate, reconstruction algorithm and different phase were evaluated. Results The best image quality was got during heart rate less than 70 beats/ min, fluctuation less than 10 beats/min, and at 75% R-R interval. The reconstruction rates with segment, burst and plus algorithm were 93.5%, 91.6% and 93.4%, respectively, and no statistical difference amount groups was found （X^2=4.163, P=0.125）. The best image quality rates reached 81.8%, 79.2% and 84.1%, respectively, and were no difference between burst and plus algorithm （P=0.004）. Conclusions Heart rate, reconstruction algorithm, reconstruction phase time are the main parameters affecting image quality of multidetector CT coronary artery angiography, high-grade image can be gotten by regulating the parameters.
出处
《岭南心血管病杂志》
2008年第1期56-58,共3页
South China Journal of Cardiovascular Diseases
基金
广东省医学科研基金(A2006030)
广东省科技攻关项目(2006B36030026)
广州市科技攻关项目(2006Z3-E0241)
